Notes on C/C++ Compiler Package & R8C Family V.6.xx Release xx

Question:

I was using an earlier version (V.5.45 Release 01 or earlier) C Compiler Package for M16C Series and R8C Family [M3T-NC30WA].

I will start to use C/C++ Compiler Package for M16C Series and R8C Family [M3T-NC30WA] V.6.xx Release xx and I am looking for documentation that offers notes or instructions pertaining to the new version compared to the old version as well as how to migrate user applications to the new version.